JPS62191290A - Rocking arm fixture in motorcycle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] LLI standing plate ■ Beans 1 In the present invention, the front wheels extend forward from the center of the vehicle.

A motor vehicle supported by a swinging arm that is supported by a swinging arm is particularly suitable for such a motorcycle, and the swinging arm is pivotally connected to the vehicle body. i! This is related to the tlf-1 structure.

Normally, the front wheel of a motorcycle is supported by a single arescopic front fork that is pivoted above the +if part of the body frame and extends downward, but without using such a bamboo wheel suspension system, i' almost horizontally from the 1g body
Motorcycles are known in which the front wheel is supported 1"i on the tip of the upper and lower moving arms extending in the +fj direction. For example, Japanese Patent Publication No. 5 B-49A This is disclosed in Japanese Patent Publication No. 15087/1987.

l'l'J 4'll * by such a swinging arm
J: For motorcycles that adopt the h type, 1) ir
The rear end of each arm is attached to the vehicle body (including the engine).
The front end of the moving arm 1 is connected to the upper end of the knuckle member that supports the front wheel on the rotating white 1. It is pivotally connected via C. The fire buckle member is connected to the steering gear (14).
C313 rotates together with the front wheels around an axis that connects the upper and lower pole joints, thereby steering the front wheels. The axis line LL that connects the upper and lower pole joints
It is inclined to the white lead line, forming a cask angle.

The upper and lower swinging arms form a parallelogram together with the body part that connects their rear ends and the knot member that connects their 11-arm ends. Even when the shaft is oscillated around a point, the inclination of the axis does not change, and the Gitosta angle is always kept substantially constant.

The present invention provides a method for controlling the above-mentioned oscillations in such a motorcycle. 1
+ arm (at least one swing arm when a pair of upper and lower swing arms is installed on the right) 8. Let's provide a swing arm handle that can be installed extremely easily on the vehicle body. That is.

-21111 plate for 1 inch of I'Tr Therefore, the swinging arm according to the present invention (J 174; Δ is 1
a support shaft provided at the rear end of the moving arm so as to be rotatable laterally; a support arm member fixed to the vehicle body and having a semi-circular cross-section for receiving the support shaft; The support 15@, which is received by the surface, has a restraining surface that matches the half circumferential surface on the opposite side to the surface (1), and a restraining portion that can be attached to and detached from the support arm member on its own. It consists of A.

According to the present invention, when attaching the moving arm to the vehicle body side, the moving arm is approached from the +if side to the support arm member, and the support shaft of the rear end of the swinging arm is attached to the supporting arm member. The receiver of the arm member is placed on a surface, this support shaft is held down by a holding member, and the holding member is fixed to the supporting arm member with a fastening means such as a bolt, so it is easy to install. r'J is extremely easy. Also, when removing the moving arm from the vehicle body, it is extremely easy to remove the holding member from the supporting arm member.

Branch JLJI Hereinafter, the present invention will be described with reference to illustrated embodiments.

FIG. 1 is a side view of a motorcycle according to the present invention, in which 1 is an engine, 2 is a suspension holder, and 3 is a monocoque frame, which supports a fuel tank T, an air cleaner C, and a seat S. A monocoque frame 3 is connected to the L engine 1 to form a rigid vehicle body. A rear wheel 5 is pivotally supported on a pivot 7 provided at the rear of a crankcase 6 of the engine 1 or at the rear end of a shaft A-ri 8. This is a rear cushion installed between 9 beams 7 forks 8 and crankcase G via a progressive printer 10. The rear wheels 5 are driven by the engine 1 via a drive chain 11.

Engine 1 is different from the engine in normal white motorcycles,
A cylinder 12 is provided to protrude above the rear part of the crankcase 6, and a transmission, a clutch, etc. are provided at the front part of the crankcase 6.

As shown in FIG. 2, from the rear of the cylinder 12
3 extends rearward and is connected to the muffler 14.

The intake pipe 15 is connected to the front of the cylinder 12,
It extends through the vaporizer 16 to "1", communicates with the air cleaner C of the dummy cylinder 3a, and forms a relatively spacious space S in front of the cylinder 12 and on one side of the crankcase 6. Brackets 1 to 17 and 17 are protruded from both sides of the crankcase 6 in this space S, and an I
-fj is pivotally supported by one arm of the arm 19.

However, the f-1 structure of the upper swinging arm 19 is not according to the present invention. The moving arm handle of the present invention (1 structure is
The upper swinging arms 19 and 6 are applied to the lower swinging arm 20 that constitutes the front wheel suspension system of this motorcycle.

The upper swinging arm 19 and the lower swinging arm 2 (11;t) both extend forward on the left side of the vehicle body, but the rear end branches into left and right 211q as shown in FIGS. 2 and 3, respectively.
The upper swing arm 19 is pivotably supported on brackets 17.17 at J5 at both ends of the pivot lN118. A support Ikl 122 is installed at the lf2 end of the branched portions 20a and 20b of the lower swing arm 20 by penetrating them laterally.
Bearings 40 are fitted into the support shaft 22 and the branching parts 20a and 20b.Therefore, the support shaft 22 is rotatably attached to the moving arm 20.On the other hand,
Support arm members 21 of left and right sides (13=1) are integrally protruded from a small front part of the crankcase 6. Support 1) The upper surface of the arm member 21 is cut horizontally as shown in FIG. 4, and the front surface is a cut surface 41; A receiving () blood 42 consisting of is provided in the 6M7j direction and opens upward.
Both ends of the I2 support 141kt122 protruding outward from the 1111 receiver 40 are pressed against the left and right receivers 42, respectively, and the outer periphery of the support shaft 22 that is exposed from the surface 42 is held by the restraining member 43. It's suppressed. The holding part (443 has a holding surface 44 which complements the surface 42)
is 1+QIJ, and the restraining member 43 is tightened with the bolt 45 toward the cut surface 41 of the support 1 Kobe shrine 21 (
) In particular, the support shaft 22 is supported by 42 and 4.
It is tightly sandwiched between the four points and is attached to the support arm +A21.

The upper swinging arm 19 and the lower swinging arm 20 extend forward from the bracket 17 and the support arm 4421, respectively, substantially parallel to the U, and have a front wheel 23 supported at their front ends. The center shaft 24 of the front wheel 23 is pivotally supported by a J-wheel member 25. The front end of the upper first moving arm 19 is connected to the upper part of the J-wheel member 25 via a ball joint 26, and the lower IJ wheel is connected to the lower part of the center shaft 24 of the front wheel 23. The 11 other ends of the υJ arm 20 are connected via a ball joint 27.

Therefore, the knuckle member 25 is a ball joint 26.27.
The notebook member 2 can be pivoted about an axis formed by J. With this pivoting of r, the front wheels 23 are deflected and steering is performed. For this purpose, an 11 knuckle arm 28 is provided on the sickle member 25 so as to protrude toward the side 7J, and a steering mechanism 29 is connected to the knuckle arm 28. For steering, +1 29 is connected to a rotating shaft 31 of a handle 30, and by operating the handle 30, steering is performed via the mechanism 29 to the knuckle member 2.
5, the front wheels 23 pivot from side to side about an axis. This 11. In order to prevent the V movement of 23 from being obstructed by the downward swinging arm 20, the lower swinging arm 20 is formed into a curved shape with the middle part protruding laterally below the water. The axis line has J as shown in the figure.
It is inclined with respect to the A line, and a -%ty star angle θ is formed.

Also, the pivot 18.22 and the ball joint 27
, 26 are connected sequentially to form a parallelogram.

Upper swing arm 19J5J, σ lower 1: The swing arm 20 moves 1 degree around the pivot shaft 18.22 due to the load acting on the motorcycle, but the above-mentioned "", uni pivot shaft 18.22. l'
Since the ball joint 27.2G or F ti forms a quadrilateral, even if the upper swinging arm 19 and the lower swinging arm 2o move, the inclination to the axis will change by 1! First, the kill star angle 0 is always kept almost constant.
A front cushion 32 having a progressive link 32a similar to that of the front cushion 9 is inserted between the front cushion 32 and the bracket provided at the front upper part of the crank woofer 6. 32.

In this embodiment, as described above, the support shaft 22 that pivotally supports the lower swinging arm 20 is formed into a support arm member 2 that is divided into two halves.
Since the first holding member 43 is tightened from below and attached to the vehicle body, when installing the downward swing S) + arm 20, the downward swing is avoided! 1 + arm 2 () from the bamboo sword supporting arm member 2
1, the support shaft 22 is placed on the support 42, and the support I and J shafts 22 are held down from above by the holding member 43,
The restraining member 43 may be fixed to the support arm member 21 with a bolt 45. Therefore, the installation of ThIce +h arm 20 is easy and the work progresses, and the front wheel 23 is attached to the downward swinging arm 20.It is possible to attach the front wheel 23 to the vehicle body while keeping it in place.
'+'ti. In addition, when removing the moving arm 20 from the vehicle body, attach the holding part +A43 to the instep of the supporting arm member 2.
1 /r' Ritatori da G no, ]～te 1z) A.

The structure for attaching the upper swinging arm 19 to the bracket 17 is the same as the structure in which the support arm member 21 of the lower swinging arm 20 is attached to f=1. Moreover, in the above embodiment, the swinging arm 1! ], 20 are directly pivoted to the engine 1, but it goes without saying that they may be pivoted to the vehicle body frame. Furthermore, the engine 1 has cylinders arranged at the rear, and is not limited to lζ etc.
The cylinders are arranged at the front! , - may be a conventional engine.

As mentioned above, according to this journal, 1: Kodo arm handle (4 (74iΔ
is installed at the rear end of the swinging arm with the rotating arm facing hl' ()
A support shaft fixedly installed on the vehicle body side and receiving the support shaft
- a support arm member having a semi-circular cross section and a support arm member having a surface; the support arm member of the support shaft received by the surface; Since the holding member is removably fixed to the supporting arm member, the work of attaching and removing the swinging arm from the vehicle body is extremely easy.

[Brief explanation of drawings]

Fig. 1 is a side view of a motorcycle equipped with a two-wheeled motorcycle structure according to the present invention, Fig. 2 is a ground view of the engine section of the motorcycle, and Fig. 3 is a bottom view. 1 is a top view showing a partial cross section of the IV part of the movable arm, and FIG. 4 is an exploded sectional view along line IV--IV in FIG. 3. 1... Engine, 2... Stem holder, 3... Monocoque frame, 5... Rear wheel, 6... Crank case, 7... Pihot, 8... Suspension A-ri ,9
...V cushion, 10...link, 11...
Drive chain 1, 12... Schilling, 13... J, Il
Trachea, 14...muffler, 15...intake pipe, 16...
・Carburetor, 17...Bracket, 18...Pivot, 1
9...Upward swinging arm, 20...Down 7! J swinging arm, 21
... Support arm member, 22 ... Support shaft, 23 ... Surface width, 24 ... Width axis, 25 ... Knuckle member, 26, 2
7...Ball joint, 28...Hookle arm, 29...Steering mechanism, 30...Handle, 31...
・Rotating shaft, 32... Front cushion, 40... Bearing, 41... Cutting surface, 42... Bearing (9
Surface, 43... Holding member, 44... Holding down, 45...
・Pol 1-1S...C] ~. Attorney 1 (I Hara, Nozomi 2)

Claims (1)

[Claims] In a motorcycle in which an engine is mounted between the front and rear wheels and the front wheels are steerably suspended via a swinging arm extending forward from the center of the vehicle, the swinging arm is provided at the rear end of the swinging arm so as to be rotatable laterally. a support shaft fixed to the vehicle body side and having a receiving surface having a semicircular cross section for receiving the support shaft; and a semicircumferential surface of the support shaft opposite to the receiving surface that is received by the receiving surface. 1. A swinging arm mounting structure comprising: a holding member having a holding surface that matches the above, and is capable of being detachably fixed to the support arm member.